JP6583929B2 - Wave forming device - Google Patents

Description

  The present invention relates to a wave forming device that is attached to a small vessel such as a marine sports boat such as a water ski or a wakeboard, and forms a wave by the movement of the small vessel.

  In a small vessel such as a wakeboard or other marine sports motor boat, a marine sports runner enjoys the surface of the water on which waves are formed by the wake of the small vessel that pulls the runner. However, conventionally, when a small ship is used, there is a problem that a large wave cannot be generated behind the ship, and the rider cannot fully enjoy sports.

  Therefore, a boat-operated wave generator is disclosed in Patent Document 1. This is because the wave generator is attached to a motorboat or the like that pulls the glider, and while the motorboat is moving in the water, the water is scooped up by the horizontal and vertical curved riding surface included in the wave generator, Waveforms such as waves and scattered waves can be formed.

  Patent Document 2 is a boat for water skiing or the like, in which a wave generator 6 having a blade 7 is disposed at the rear of the boat, and a wave is generated by the wave generator 6 when the boat is advanced by the propeller 5. The technology is disclosed.

Japanese National Patent Publication No. 11-506714 Australian Patent Application Publication No. 2016203389

  However, in the wave generators disclosed in Patent Document 1 and Patent Document 2, since the apparatus has a weak force for scooping up water and the generated waves are small, the user can fully enjoy the thrill and enjoy sports. There wasn't.

  The present invention has been made paying attention to the above problems, and in marine sports such as water skiing and wakeboarding, even a small ship forms a big wave in the back, and gliders such as water skiers and wakeboarders, Provided is a wave forming device that can fully enjoy a water-based run with waves.

The invention according to claim 1 is a cylindrical body that is mounted horizontally at the rear of a small vessel, and a water inlet into which water flows in along with the movement of the small vessel, and water that has flowed in from the water inlet. A booster having a water outlet that flows out and an inclined portion in which an upper surface and a bottom surface of the end of the water outlet are inclined upward toward the water outlet, and the water inlet has a cross-sectional area 1.5 to 4 times that of the water outlet. A wave forming device characterized by comprising:

  The term “small ship” as used herein means a small ship mainly used for marine sports, including motor boats and water bikes. The “cylindrical body” can take various shapes such as square, round, oval, oval, etc. in cross section. The cylindrical body preferably has a structure that inclines from the front to the rear or a shape that bends. For example, as the axial direction of the cylindrical body increases from the front toward the rear, the cylindrical body rises to the right, or from the first member at the front and the second member at the rear connected to the first member. Thus, it is preferable that the inclination of the first member in the axial direction is larger than the inclination of the second member in the axial direction. The ratio of the cross-sectional area of the water outlet to the cross-sectional area of the water inlet is preferably 1.3 to 10 times, and particularly preferably 1.5 to 4 times.

  According to this configuration, in the wave forming device, the water flow rate at the water flow outlet is higher than the water flow rate at the water flow inlet, and the water flowing from the inclined portion flows out obliquely upward from the water flow outlet. The water coming out of it can form a big wave with surrounding water.

  Further, the invention according to claim 2 is the wave forming device according to claim 1, wherein the wave forming device has a plurality of poles extending vertically, and the booster is vertically moved along the pole. It can be moved up and down.

  According to this configuration, the booster can be placed above the surface of the water when the booster is not used, when the small ship moves to a shallow place, or at low tide, and the small ship reaches the offshore where the water depth is deep. It is possible to place the booster downward only when it is desired to use it for forming. For this reason, it is possible to suppress a reduction in driving efficiency of the small boat by the booster.

  According to a third aspect of the present invention, in the wave forming device according to the second aspect, a substantially horizontal step is provided above the booster, and the step is moved up and down along the pole together with the booster. It can be moved up and down.

  According to this configuration, after the rider gets on the ship and arrives at the destination, the runner uses the platform to descend from the ship to the sea. can do. Since the platform can be raised and lowered, a platform with the best height for the rider can be prepared.

  According to the present invention, the wave forming device is large because the booster scoops up the wave and creates a flow in an obliquely upward direction and increases the flow velocity, and the water from the water outlet further flows upward with the surrounding water. Waves can be formed. Therefore, the runner can enjoy sports such as water skiing and wakeboarding more. In addition, the booster can be raised and lowered, and the booster can be disposed below the sea level only when the booster is used, so that the driving efficiency of a small vessel is not reduced unnecessarily. Furthermore, since a step that can be raised and lowered is disposed above the booster, the height of the step required by the rider can be determined as appropriate.

It is the schematic showing the use condition of the wave formation apparatus of this embodiment. It is a side view of the booster of the wave formation apparatus of this embodiment. It is a front view of the wave formation apparatus of this embodiment. It is a top view showing the connection state of the wave formation apparatus of this embodiment and a small ship.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 4, the wave forming device 1 of this embodiment includes a booster 2, two vertically extending poles 3, and a platform 4. The wave forming device 1 is attached to the rear wall of the motor boat 5, and the wave forming device 1 moves as the motor boat 5 moves. In the present embodiment, the wave forming device 1 is applied to a motor boat used for a wakeboard. As shown in FIG. 1, a rope with a handle is connected to the motor boat 5, and the glider rides on a plate-like sliding tool and tows the motor boat 5 with the handle to which the rope is connected. While being slipped on the water surface.

  As shown in FIGS. 2 and 3, the booster 2 has a cylindrical shape with a quadrangular section made of stainless steel or resin, and has a horizontally placed structure in which water penetrates in the horizontal direction. A water outlet 22 having a surface, a bottom surface 23 inclined upward from the lower side of the water inlet 21 toward the lower side of the water outlet 22, and a first upper surface extending substantially horizontally from the upper side of the water inlet 21 toward the upper side of the water outlet 22 24, and subsequently, a second upper surface 25 inclined to the upper side, a side surface 26, and a connecting plate 28 extending laterally from the side of the inflow port.

  Since the height and width of the water inlet 21 are both larger than the height and width of the water outlet 22, the area of the water inlet 21 is larger than the area of the water outlet. Therefore, the water is contracted when passing, and the flow rate of water at the water outlet 22 is higher than the flow rate of water at the water inlet 21. The area ratio of the water inlet 21 and the water outlet 22 is preferably 1.3 to 10 times, and more preferably 1.5 to 4 times. If it is smaller than 1.3 times, the water flow rate is not increased sufficiently and a large wave cannot be produced. On the other hand, when the ratio is larger than four times, there is a problem that the load applied to the pole 3, the booster 2 and the motor boat is so great that it may be damaged. This problem can be overcome by using high strength materials, but 10 times is the limit. In the present embodiment, as an example, the area of the water inlet 21 is three times the area of the water outlet 22. Therefore, the water flow rate at the water outlet 22 is three times the water flow rate at the water inlet 21. The second upper surface 25, a part of the bottom surface 23 on the outlet 22 side, and a part of the side surface 26 on the outlet 22 side form an inclined portion 27 and allow water to flow obliquely upward from the outlet 22.

  The water flowing in from the water inlet 21 has a gradually increasing flow velocity toward the water outlet 22 as the cross-sectional area of the booster 2 is reduced toward the water outlet 22, and a part of the bottom surface 23 inclined upward and The flow direction is changed obliquely upward by the inclined portion 27 including the second upper surface 25, and the water flows out vigorously from the water outlet 22. The spilled water flows upward along with surrounding water, forming or amplifying waves. Since the water flowing out from the water outlet 22 flows out toward the rider, waves can be efficiently formed around the rider.

  The booster 2 is not limited to the above-described shape, and the upper surface is gently inclined from the upper side of the inlet 21 toward the upper side of the outlet 22, and the upper and lower surfaces are curved from the inlet 21 to the outlet 22. However, a shape that is inclined upward is also suitable.

  The two poles 3 have a hollow rectangular tube 31 that extends in the vertical direction and is substantially U-shaped in plan view. Inside the rectangular tube 31, there are provided a sliding member 32 that can slide up and down, and a hydraulic cylinder (not shown) that moves the sliding member 32 up and down. The hydraulic cylinder is provided above the sliding member 32 in order to avoid corrosion such as rust caused by seawater. An electric motor (not shown) and a hydraulic pump (not shown) are attached to the side surface of the pole 3 on the motor boat 5 side, and a control box for controlling the electric motor is attached to the rear part of the motor boat 5. A person on the motor boat 5 drives an electric motor by a control box, sends oil from a hydraulic pump to a hydraulic cylinder through piping, and controls the hydraulic pressure to change the stroke of the hydraulic cylinder. The sliding member 32 slides up and down by the expansion and contraction of the hydraulic cylinder. The control box has, for example, an emergency stop button in addition to an up button and a down button. The emergency stop button is provided for the purpose of safety measures, and is used when a rider or the like accidentally catches a hand or a foot. A connecting plate 28 of the booster 2 is connected to the sliding member 32 via a bolt. Therefore, the booster 2 can be moved up and down along the two poles 3. The raising and lowering of the booster 2 up and down is not limited to hydraulic driving, and can be appropriately changed using current technology such as driving with air pressure.

  As shown in FIG. 1, the upper ends of the two poles 3 are positioned below the rope pulling the rider, so that the ropes do not interfere with the pole 3 and the booster 2.

  1 and 3 are views when the booster 2 is disposed at the lowest position, and the entire booster 2 is located in water. When the booster 2 is disposed at the uppermost position, the entire booster 2 is positioned above the water surface. Since the booster 2 moves up and down, the booster 2 is arranged upward when the booster 2 is not in use to suppress the reduction in driving efficiency of the motor boat, or when the motor boat 5 is at a shallow water depth or at low tide, the booster 2 is It can be arranged above so as not to collide with. The booster 2 can be arranged downward only when the motor boat 5 reaches the deep offshore and wants to use it for wave formation.

  At the time of wave formation, the booster 2 is arranged at the lowest position. In the arrangement, the upper side of the booster water outlet 22 is close to the sea surface. Since the water exiting from the water outlet 22 is accompanied by surrounding water and flows upward toward the sea surface, a large wave is formed. Further, in the same arrangement, the water inlet 21 is preferably behind the screw 7 of the motor boat 5 and at a height close to the screw 7, so that more water can flow into the wave inlet. The forming function is increased.

  The step 4 is a trapezoidal plate made of stainless steel or resin in a substantially horizontal plan view, is above the booster, and is connected to the sliding members 32 of the two poles 3 via connection members 41. Yes. Along with the booster, it can be raised and lowered along the pole. The platform 4 is used when the runner gets off or gets on the motor boat before or after starting to run. Since the platform 4 can be raised and lowered, the platform can be positioned at a height that is most convenient for the rider.

A connection structure between the wave forming device and the motor boat will be described.
As shown in FIGS. 1 and 4, a frame 6 to which a square tube 31 of a pole 3 is connected is connected to a rear side wall of the motor boat via a plurality of bolts. The frame 6 includes a horizontal frame 61 in the horizontal direction, two upper frames 62 extending from the front end of the frame 61 to the top of the pole, and two lower frames 63 extending from the front end of the frame 61 to the bottom of the pole. In FIG. 4, the upper frame 62 is omitted for convenience. The horizontal frame 61 is provided not only at the rear end of the motor boat 5 but also along the side wall of the motor boat 5 in order to increase the connection strength.

  The present invention is not limited to the above-described embodiments, and modifications and the like can be made without departing from the technical idea of the present invention. Is included in the technical scope. For example, in the above embodiment, the water forming apparatus is connected to a motor boat, but a water bike may be used instead of the motor boat. In addition, within the scope of the object of the invention, the range of dimensions and materials of each member can be changed as appropriate.

  The wave forming apparatus of the present invention can be used in various marine sports such as water skiing and wake surfing in addition to a wakeboard.

1: Wave forming device 2: Booster 21: Water inlet 22: Water outlet 23: Bottom surface 24: First upper surface 25: Second upper surface 26: Side surface 27: Inclined portion 28: Connection plate 3: Pole 31: Square tube 32: Sliding Moving member 4: Step 41: Connection member 5: Motor boat 6: Frame 61: Horizontal frame 62: Upper frame 63: Lower frame 7: Screw

Claims (3)

A cylindrical body mounted horizontally at the rear of a small ship, a water inlet into which water flows in as the small ship moves, a water outlet from which water flowing in from the water inlet flows out, and the water flow An upper surface and a bottom surface of the end portion of the water outlet toward the outlet are provided with inclined portions that are inclined upward, and the water inlet has a booster having a cross-sectional area of 1.5 to 4 times that of the water outlet. Features
Wave forming device. It has a plurality of poles extending vertically,
The booster can be moved up and down along the pole,
The wave forming apparatus according to claim 1. A substantially horizontal step is provided above the booster,
The step, together with the booster, can be moved up and down along the pole,
The wave forming device according to claim 2.

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